1040100221 has 2 divisors, whose sum is σ = 1040100222. Its totient is φ = 1040100220.

The previous prime is 1040100209. The next prime is 1040100233. The reversal of 1040100221 is 1220010401.

It is a balanced prime because it is at equal distance from previous prime (1040100209) and next prime (1040100233).

It can be written as a sum of positive squares in only one way, i.e., 1031308996 + 8791225 = 32114^2 + 2965^2 .

It is an emirp because it is prime and its reverse (1220010401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1040100221 - 2⁶ = 1040100157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040102221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520050110 + 520050111.

It is an arithmetic number, because the mean of its divisors is an integer number (520050111).

Almost surely, 2^1040100221 is an apocalyptic number.

It is an amenable number.

1040100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040100221 is an equidigital number, since it uses as much as digits as its factorization.

1040100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1040100221 is about 32250.5848164029. The cubic root of 1040100221 is about 1013.1919475981.

Adding to 1040100221 its reverse (1220010401), we get a palindrome (2260110622).

The spelling of 1040100221 in words is "one billion, forty million, one hundred thousand, two hundred twenty-one".